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            <h1 id="date-range-picker-fix-documentation">
  
  
    <a href="#date-range-picker-fix-documentation" class="anchor-heading" aria-labelledby="date-range-picker-fix-documentation"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> Date Range Picker Fix Documentation
  
  
</h1>
    
<h2 id="issue">
  
  
    <a href="#issue" class="anchor-heading" aria-labelledby="issue"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> Issue
  
  
</h2>
    
<p>The daterangepicker plugin was throwing an error:</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Error setting default dates for date range picker: TypeError: Cannot read properties of undefined (reading 'clone')
</code></pre></div></div>
<h2 id="root-cause">
  
  
    <a href="#root-cause" class="anchor-heading" aria-labelledby="root-cause"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> Root Cause
  
  
</h2>
    
<p>The daterangepicker library was designed to work with moment.js, which has a native <code class="language-plaintext highlighter-rouge">clone()</code> method. The project initially used Day.js as a modern replacement for moment.js, but Day.js doesn’t have the exact same API as moment.js. Attempts to create a compatibility layer were unsuccessful due to subtle API differences.</p>
<h2 id="final-solution-implemented">
  
  
    <a href="#final-solution-implemented" class="anchor-heading" aria-labelledby="final-solution-implemented"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> Final Solution Implemented
  
  
</h2>
    
<h3 id="1-installed-required-packages">
  
  
    <a href="#1-installed-required-packages" class="anchor-heading" aria-labelledby="1-installed-required-packages"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> 1. Installed required packages
  
  
</h3>
    
<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>npm <span class="nb">install </span>daterangepicker moment
</code></pre></div></div>
<h3 id="2-dual-date-library-setup-in-mainjs">
  
  
    <a href="#2-dual-date-library-setup-in-mainjs" class="anchor-heading" aria-labelledby="2-dual-date-library-setup-in-mainjs"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> 2. Dual Date Library Setup in main.js
  
  
</h3>
    
<p>Configured both Day.js (primary) and moment.js (for daterangepicker) to coexist:</p>

<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1">// Day.js for modern date manipulation (primary library)</span>
<span class="k">import</span> <span class="nx">dayjs</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">dayjs</span><span class="dl">'</span><span class="p">;</span>

<span class="c1">// Day.js plugins for enhanced functionality</span>
<span class="k">import</span> <span class="nx">duration</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">dayjs/plugin/duration</span><span class="dl">'</span><span class="p">;</span>
<span class="k">import</span> <span class="nx">relativeTime</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">dayjs/plugin/relativeTime</span><span class="dl">'</span><span class="p">;</span>
<span class="k">import</span> <span class="nx">utc</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">dayjs/plugin/utc</span><span class="dl">'</span><span class="p">;</span>
<span class="k">import</span> <span class="nx">timezone</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">dayjs/plugin/timezone</span><span class="dl">'</span><span class="p">;</span>
<span class="k">import</span> <span class="nx">customParseFormat</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">dayjs/plugin/customParseFormat</span><span class="dl">'</span><span class="p">;</span>
<span class="k">import</span> <span class="nx">advancedFormat</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">dayjs/plugin/advancedFormat</span><span class="dl">'</span><span class="p">;</span>
<span class="k">import</span> <span class="nx">isBetween</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">dayjs/plugin/isBetween</span><span class="dl">'</span><span class="p">;</span>
<span class="k">import</span> <span class="nx">weekOfYear</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">dayjs/plugin/weekOfYear</span><span class="dl">'</span><span class="p">;</span>
<span class="k">import</span> <span class="nx">dayOfYear</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">dayjs/plugin/dayOfYear</span><span class="dl">'</span><span class="p">;</span>

<span class="c1">// Enable Day.js plugins</span>
<span class="nx">dayjs</span><span class="p">.</span><span class="nx">extend</span><span class="p">(</span><span class="nx">duration</span><span class="p">);</span>
<span class="nx">dayjs</span><span class="p">.</span><span class="nx">extend</span><span class="p">(</span><span class="nx">relativeTime</span><span class="p">);</span>
<span class="nx">dayjs</span><span class="p">.</span><span class="nx">extend</span><span class="p">(</span><span class="nx">utc</span><span class="p">);</span>
<span class="nx">dayjs</span><span class="p">.</span><span class="nx">extend</span><span class="p">(</span><span class="nx">timezone</span><span class="p">);</span>
<span class="nx">dayjs</span><span class="p">.</span><span class="nx">extend</span><span class="p">(</span><span class="nx">customParseFormat</span><span class="p">);</span>
<span class="nx">dayjs</span><span class="p">.</span><span class="nx">extend</span><span class="p">(</span><span class="nx">advancedFormat</span><span class="p">);</span>
<span class="nx">dayjs</span><span class="p">.</span><span class="nx">extend</span><span class="p">(</span><span class="nx">isBetween</span><span class="p">);</span>
<span class="nx">dayjs</span><span class="p">.</span><span class="nx">extend</span><span class="p">(</span><span class="nx">weekOfYear</span><span class="p">);</span>
<span class="nx">dayjs</span><span class="p">.</span><span class="nx">extend</span><span class="p">(</span><span class="nx">dayOfYear</span><span class="p">);</span>

<span class="c1">// Enhanced dayjs wrapper for consistency</span>
<span class="kd">const</span> <span class="nx">createDayjsWithClone</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(...</span><span class="nx">args</span><span class="p">)</span> <span class="p">{</span>
  <span class="kd">const</span> <span class="nx">instance</span> <span class="o">=</span> <span class="nx">dayjs</span><span class="p">(...</span><span class="nx">args</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">instance</span><span class="p">.</span><span class="nx">clone</span><span class="p">)</span> <span class="p">{</span>
    <span class="nx">instance</span><span class="p">.</span><span class="nx">clone</span> <span class="o">=</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span> <span class="k">return</span> <span class="nx">dayjs</span><span class="p">(</span><span class="k">this</span><span class="p">);</span> <span class="p">};</span>
  <span class="p">}</span>
  <span class="k">return</span> <span class="nx">instance</span><span class="p">;</span>
<span class="p">};</span>

<span class="nb">Object</span><span class="p">.</span><span class="nx">keys</span><span class="p">(</span><span class="nx">dayjs</span><span class="p">).</span><span class="nx">forEach</span><span class="p">(</span><span class="nx">key</span> <span class="o">=&gt;</span> <span class="p">{</span>
  <span class="nx">createDayjsWithClone</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">=</span> <span class="nx">dayjs</span><span class="p">[</span><span class="nx">key</span><span class="p">];</span>
<span class="p">});</span>
<span class="nx">createDayjsWithClone</span><span class="p">.</span><span class="nx">prototype</span> <span class="o">=</span> <span class="nx">dayjs</span><span class="p">.</span><span class="nx">prototype</span><span class="p">;</span>
<span class="nx">createDayjsWithClone</span><span class="p">.</span><span class="nx">fn</span> <span class="o">=</span> <span class="nx">dayjs</span><span class="p">.</span><span class="nx">prototype</span><span class="p">;</span>

<span class="c1">// Make Day.js available globally (primary date library)</span>
<span class="nb">window</span><span class="p">.</span><span class="nx">dayjs</span> <span class="o">=</span> <span class="nx">createDayjsWithClone</span><span class="p">;</span>
<span class="nx">globalThis</span><span class="p">.</span><span class="nx">dayjs</span> <span class="o">=</span> <span class="nx">createDayjsWithClone</span><span class="p">;</span>

<span class="c1">// Import real moment.js for daterangepicker compatibility</span>
<span class="k">import</span> <span class="nx">moment</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">moment</span><span class="dl">'</span><span class="p">;</span>

<span class="c1">// Make moment.js available globally for daterangepicker</span>
<span class="nb">window</span><span class="p">.</span><span class="nx">moment</span> <span class="o">=</span> <span class="nx">moment</span><span class="p">;</span>
<span class="nx">globalThis</span><span class="p">.</span><span class="nx">moment</span> <span class="o">=</span> <span class="nx">moment</span><span class="p">;</span>
</code></pre></div></div>
<h3 id="3-import-daterangepicker-after-setup">
  
  
    <a href="#3-import-daterangepicker-after-setup" class="anchor-heading" aria-labelledby="3-import-daterangepicker-after-setup"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> 3. Import daterangepicker after setup
  
  
</h3>
    
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1">// Import daterangepicker AFTER both libraries are configured</span>
<span class="k">import</span> <span class="dl">'</span><span class="s1">daterangepicker</span><span class="dl">'</span><span class="p">;</span>
<span class="k">import</span> <span class="dl">'</span><span class="s1">daterangepicker/daterangepicker.css</span><span class="dl">'</span><span class="p">;</span>

<span class="c1">// Verification logging</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">'</span><span class="s1">Date libraries setup complete:</span><span class="dl">'</span><span class="p">,</span> <span class="p">{</span>
  <span class="na">dayjs</span><span class="p">:</span> <span class="k">typeof</span> <span class="nb">window</span><span class="p">.</span><span class="nx">dayjs</span><span class="p">,</span>
  <span class="na">moment</span><span class="p">:</span> <span class="k">typeof</span> <span class="nb">window</span><span class="p">.</span><span class="nx">moment</span><span class="p">,</span>
  <span class="na">momentClone</span><span class="p">:</span> <span class="k">typeof</span> <span class="nb">window</span><span class="p">.</span><span class="nx">moment</span><span class="p">().</span><span class="nx">clone</span>
<span class="p">});</span>
</code></pre></div></div>
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</h2>
    
<ul>
  <li><code class="language-plaintext highlighter-rouge">/src/main.js</code> - Added Day.js plugins and daterangepicker imports</li>
  <li><code class="language-plaintext highlighter-rouge">/package.json</code> - Added daterangepicker dependency</li>
</ul>
<h2 id="verification">
  
  
    <a href="#verification" class="anchor-heading" aria-labelledby="verification"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> Verification
  
  
</h2>
    
<p>After implementing this fix:</p>
<ul>
  <li>✅ Build completes successfully</li>
  <li>✅ No more clone() method errors</li>
  <li>✅ Daterangepicker functionality restored</li>
  <li>✅ Day.js compatibility maintained</li>
</ul>
<h2 id="why-this-solution-works">
  
  
    <a href="#why-this-solution-works" class="anchor-heading" aria-labelledby="why-this-solution-works"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> Why This Solution Works
  
  
</h2>
    
<h3 id="dual-library-approach">
  
  
    <a href="#dual-library-approach" class="anchor-heading" aria-labelledby="dual-library-approach"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> <strong>Dual Library Approach</strong>
  
  
</h3>
    
<ul>
  <li><strong>Day.js</strong>: Primary date library for modern date manipulation (lighter, faster)</li>
  <li><strong>Moment.js</strong>: Specifically for daterangepicker compatibility (full API support)</li>
  <li><strong>Coexistence</strong>: Both libraries work together without conflicts</li>
</ul>
<h3 id="benefits">
  
  
    <a href="#benefits" class="anchor-heading" aria-labelledby="benefits"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> <strong>Benefits</strong>
  
  
</h3>
    
<ol>
  <li><strong>100% Compatibility</strong>: Real moment.js ensures daterangepicker works perfectly</li>
  <li><strong>Modern Development</strong>: Day.js available for new code and general date operations</li>
  <li><strong>No API Gaps</strong>: Eliminates compatibility layer complexity</li>
  <li><strong>Clean Separation</strong>: Each library serves its specific purpose</li>
</ol>
<h2 id="alternative-solutions-attempted">
  
  
    <a href="#alternative-solutions-attempted" class="anchor-heading" aria-labelledby="alternative-solutions-attempted"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> Alternative Solutions Attempted
  
  
</h2>
    
<ol>
  <li><strong>Day.js Compatibility Layer</strong>: Failed due to subtle API differences</li>
  <li><strong>Enhanced Clone Method</strong>: Couldn’t replicate full moment.js behavior</li>
  <li><strong>Wrapper Functions</strong>: Daterangepicker still couldn’t access required methods</li>
  <li><strong>Replace daterangepicker</strong>: Would require extensive code rewriting</li>
  <li><strong>Full moment.js migration</strong>: Would lose Day.js performance benefits</li>
</ol>
<h2 id="why-this-solution-is-optimal">
  
  
    <a href="#why-this-solution-is-optimal" class="anchor-heading" aria-labelledby="why-this-solution-is-optimal"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> Why This Solution is Optimal
  
  
</h2>
    
<ul>
  <li><strong>Pragmatic</strong>: Uses the right tool for each job</li>
  <li><strong>Maintainable</strong>: Clear separation of concerns</li>
  <li><strong>Performance</strong>: Day.js for new code, moment.js only where needed</li>
  <li><strong>Future-proof</strong>: Easy to migrate daterangepicker when Day.js-compatible alternatives emerge</li>
</ul>
<h2 id="testing">
  
  
    <a href="#testing" class="anchor-heading" aria-labelledby="testing"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> Testing
  
  
</h2>
    
<p>To test the daterangepicker functionality:</p>
<ol>
  <li>Navigate to pages with date range pickers (e.g., reports, analytics)</li>
  <li>Verify that date pickers open and function correctly</li>
  <li>Check browser console for absence of clone() errors</li>
  <li>Test date selection and range functionality</li>
</ol>
<h2 id="future-considerations">
  
  
    <a href="#future-considerations" class="anchor-heading" aria-labelledby="future-considerations"><svg viewBox="0 0 16 16" aria-hidden="true"><use xlink:href="#svg-link"></use></svg></a> Future Considerations
  
  
</h2>
    
<ul>
  <li>Consider migrating to a Day.js native date picker in future major versions</li>
  <li>Monitor daterangepicker updates for native Day.js support</li>
  <li>Evaluate bundle size impact of daterangepicker dependency</li>
</ul>

          

          
            
          
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